Add interactive mapping example and update README with example link

[agonzalezjr327]

Overview

This PR adds a new example for interactive mapping with Folium, located at examples/interactive_map_example.py.

What's Included

• A script that creates an interactive Leaflet map with markers and popups.
• An update to README.rst with:
  • A new "Examples" section
  • Instructions on how to run the script
  • A link to the example script

Motivation

This contribution demonstrates a common use case — interactive mapping in Python — and includes both code and documentation as part of an open-source contribution task.

Let me know if changes are needed. Thanks!

[hansthen]

Hey, thank you for your contribution. This particular use case is, I think, already documented properly elsewhere. See: https://python-visualization.github.io/folium/latest/user_guide/ui_elements/popups.html. Can you have a look and see if that page is sufficient for your needs?